Fire-box grate



Jan. 1, 1924 1,419,501

O. A. HEDENGREN FIRE BOX GRATE /7' TUR/#05:

1924 Jan' 1 o. A. HEDENGREN FIRE BOX GRATE Filed Aug. 31 1921 4 Sheets-Sheet 2 /7 T Tag/V575.

y Jan. 1,1924

. 0- A. HEDENGREN FIRE BOX GRATE Fild Aug- 31 1921 4 ShBB'SShSBt 4 fig-f6.

Patented Jan. 1, 1924.

UNITED STATES OSSIAN A. HEDENGREN, OF TAUNTON, MASSACHUSETTS.

FIRE-BOX GRATE.

Application led August 31, 1921.

.To aZZ whom t may concern:

Beit known that'I, OssiAN A. HEDEN- GREN of Taunton, in the county of Bristol and tate of Massachusetts, a citizen of the United States, haveinvented a new and usefiil Improvement in Fire-BOX Grates, of which thev vfollowing is a specification.

My improvement relates especially to the ,fixe box` of a stove and it consists essentially in .a construction whereby the grate bars are hung so that they may not only be rorated or oscillated to clean the fire box, but may be swung out of, the way to dump the ashes. It will Le evident to one skilled in the art that this desirable result may be secured in a variety of ways differing from each ether only in mechanical details, and yetpxnbody the invention as set forth inmy claims. f

I have shown in the drawings the preerredr embodiment of my invention as applied to a. stove.

:.(Fig, -1 is a horizontal section of a stove embodying my invention takenlon line 1-1 of Fig. 2, the grate being in place and part of the hed'plate being indicated in dotted lines.

Fig..2,is a .front view, a portion ofthe `journal platebeing broken away to show the operating parts and the door being omitted.

Fig. 3 is a front view showing the journal plate. A l i' Fig. 4 is an end elevation, the journal plate being removed and the parts being in .dumping position.

Figs. 5 and 6 are vertical sections on lines 5 5- and 6-6, respectively, of Fig. 1.

VFig. ,7 is a diagrammatic section to illustrate the operation of the invention.

The iron walls 1 of the stove and the door .150 may be of any desired construction or shape and enclose the linings 2 and bed frame 3. 6 is a cover plate.

As shown the bed frame has sockets 4 cast in its rear end and in these sockets 4 lie the rear ends of two side bars 5, 51, the front ends-of which pass through the front 71 of the stove and the iron lining 7.

As shown these side bars 5, 51, are nearly circular in cross section, but have projections 52 at intervals thereon and each carries at its rear end an arm 8 having a bearing 9 at its free end (see Figs. 5 and 6). The grate bars have rear circular ends 10, each of which is provided with a lug 11 Serial No. 497,218.

adapted to limit the movement of the grate bar in the bearing,vwhich is slotted or cut away to provide shoulders 12 for this purpose. The lugs also prevent the grate bars from sliding rearwardly in the bearings.

The grate bars may be of any desired shape to provide a proper grid to hold up the fuel. The grid portion of each bar comprises portions 102 preferably triangular in cross sectionseparated by triangular supporting sections 103, each of said portions 102 beipg substantially-fiat on the side 104 which is intended to carry the fuel, the other two sides 105 being suitably shaped to assist in riddingthe fire 0i' the clinkers and ashes when the grate bars are shaken. The supporting sections 102 are arranged to register with the projections 52 of the side bars 5, 51.. It will be understood that the precise shape of these various parts is immaterial so long as they support the lire prop erly and wheny shaken clear the fire.

The front ends of these grate bars also passthrough openings in the front 71 of the stove and each carries atitsfront end, which is irregularly shaped as at 108, a se `ment gear 13 having an opening correspon ingly shaped, the two segment gears meshing,` one of the grate bars -being shaped as at 106 to receive the ordinary'c'rank handle (not shown), this lconstruction being suoli that the oscillation of one bar 10 by the crank handle will Yshake both bars in the ordinary way.I The front end, of each bar carries a lug 107 to prevent it from slidin and said frontl end of each bar' is journa ed in one end of` an arm 14, the other end of which is fixedly attached to a side bar 5 or 51, said bars beingprovided with lugs which set into openings in the arms14 so that the said bars and segmentsJ will'be turned together, the outer end of the side bar 5 beingrconstructed as at 53 Vto receive and be turned by a crank handle. A collar 54 is carried by each side bar to hold it in place, the arm 14 resting between these collars and the cover plate 6.

Each arm 14 carries a segment gear 56, these gears being arranged to intermesh and the front stove plate 71 has slots 61 to allow the side bars to be put into place, and also segmental slots 62 in which the grate bars move when they are swung downward to dump the ashes.

The cover plate 6 is suitably shaped to cover these various parts and is held against the stove front by buttons 16, said cover plate being supported on lugs 15. Through the cover plate passes a stud 17 carrying at its inner end a finger 18 adapted to reach between the teeth of one of the segments 56 so as to lock it in place, and at its other end a handle 19 outside the cover plate by which the finger may be moved. Stops 191 limit the movement of the handle 19.

The cover plate may have openings as shown for the ends of the grate bars and as shown has a housing 2() having an opening for the shaking handle, said housing being provided with a pivoted cover 21 to be opened when the grate is to be shaken.

The housing is shaped to cover one of the slots 62.

I prefer to provide the rear part of each segment 13 with a guiding surface 130 which engages with a corresponding surface 600 .on a sed part of the frame and so is kept in such position during the dumping operation that when the grate bars are raised into supporting position their surfaces 104 will be in proper position to support the fuel. 1n other words the contacting surfaces 130 and 600 prevent or limit turning movements of the grate bars so that they cannot become misplaced when lowered for dumping and. so that when their carrying arms 8 are again moved upward said bars will be in such positions that the surfaces 104i will be uppermost, as shown in Fig. 4.

The operation of my invention is simple and it is believed will be understood from what has been said above. So far as the grate bars are concerned, they maybe of any desired construction and operated in any desired way. The main novelty of my construction lies in the fact that the grate bars which normally close the bottom of the fire box and may be rotated or oscillated in the usual manner, may be displaced when it is desired to dump the fire so as to expose substantially the entire opening at the bottom of the tire box and allow the conltents of the fire box to fall into the ash pan below. As shown this is accomplished by supporting the grate bars in swingable arms carried by turnable side bars but I do not mean to limit my invention to this specific construction nor do 1 limit myself to the specific means for holding the vparts in fuel supporting position for other equivalent means of embodying the invention set out in the claimswill occur to those skilled in the art;

What I claim as my invention is:

1. A rocking and dumping grate for tire boxes comprising suitable supports, two side bars pivotall-y mounted in said supports and provided with arms extending inward towards each other and with intermeshing segment gears, and grate bars pivotally mounted in saidvarms and also provided with intermeshing segment gears.

2. A rocking and dumping grate for fire boxes comprising suitable supports, two sidebars pivotally mounted in said supports and .provided with arms extending inward towarflls each other and with intermeshing segment gears, grate bars pivotally mounted in said arms and also provided with intermeshing segment gears, means whereby said gratev bars may be rocked in their bearings in said arms to shake the grate, and means whereby said side bars may be turned in their bearings in said supports to move the grate bars bodily downward away from each other in dumping.

' 3. A rocking and dumping grate for fire boxes comprising suitable supports, two side bars pivotally mounted in said supports and provided with arms extending inward towards each other and with intermeshing segment gears, grate bars pivotally mounted in said arms and also rovided with outer meshing segment gears, means where by said grate bars may be rocked in their bearings in said arms to shake the girate, means for limiting the rocking movement of said grate bars in their bearings in said arms, and means whereby said side hars may be turned in their bearings in said supports to move the grate bars bodily downward away from each other in dumpllgf 4. A rocking and dumping grate for fire boxes comprising suitable supports,V two side barspivotally mounted in said supports and provided with arms extending inward towards each other and with intermeshing segment gears, grate bars pvotally mounted in sai arms and also provided with intermeshin'g segment gears, means whereby said grate bars may be rocked in their bearings in said armste shake the grate, means whereby said side bars may lbe turned in their bearings in said supports to move the grate bars bodily downward away lfrom each other in dumping, andv means for maintaining said grate bars in proper positions during dumping operations.

OSSIAN A. HEDENGREN. 

